New Study: Over a Trillion becquerels of Fukushima radiocesium fell on Hawaii

University of Hawai’i at Mānoa, Oct 31, 2017

Fukushima-derived radiocesium fallout in Hawaiian soils… This study estimated the magnitude of cesium deposition in soil, collected in 2015-2016, resulting from atmospheric fallout… Detectable, Fukushima-derived 134Cs inventories ranged from 30 to 630 Bq m-2 and 137Cs inventories ranged from 20 to 2200 Bq m-2… This research confirmed and quantified the presence of Fukushima-derived fallout in the state of Hawai’i in amounts higher than predicted by models and observed in the United States mainland…

The Hawaiian Islands were expected to get minimal, below 10 Bq m-2 or lower, of Fukushima-derived fallout…

Maximum estimated values of 134Cs fallout on the islands of Hawaii and O’ahu constrained by precipitation and data from sites with less than 70% canopy cover were obtained by linear interpolation of all measured soil cesium concentrations, resulting in 134Cs fallout ranging from < 60 to 1000 Bq m-2 [According to this study, “The Fukushima-derived fallout… 134Cs to 137Cs ratio was 1:1” — therefore 137Cs fallout from Fukushima was also 60 to 1000 Bq m-2, making the total radiocesium 120 to 2000 Bq m-2. Compare this to the study’s previous statement that “The Hawaiian Islands were expected to get minimal, below 10 Bq m-2 or lower, of Fukushima-derived fallout”]…

Using the conservative values and integrating over the whole area with rainfall above 200 mm, we estimate that the island of Hawaii received 1.50 x 10^12 Bq [1.5 Trillion Bq] of 134Cs and 137Cs, each isotope contributing 50%, between March 19 and April 4, 2011…

Atmospheric dispersion models predicted the majority of the plume to travel a more northern route over the Aleutian Islands… however, suggesting that the Fukushima-derived aerosol plume may have taken an alternative southern path. Our radiocesium fallout inventories are comparatively higher than those estimated and measured in North America. Previous research that used whole-water wet deposition to predict ‘its fallout in North America estimated up to 180 Bq m -2 in Alaska, 46 Bq m -2 in California, and 29 Bq m -2 in Washington State…

This is the first study to our knowledge studying Fukushima-derived fallout in the Pacific Islands…

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I am a simple everyday Joe. If you were to break this down into terminology the everyday person could understand it would be appreciated. By reading the article I conclude we were expecting 10B and received 1000B. That is 100 Times more exposure than expected. Is this dangerous? I was trained in terms of Rads. I do know that radioactive cesium is very dangerous.
As we said in the Army, can you break this down Barney Style, so we can understand.
Thank you
Jerry

Don’t believe the spin on thorium being a greener nuclear option http://tinyurl.com/zk8jt3a Ecologist: thorium is merely a way of deflecting attention and criticism from the dangers of the uranium fuel cycle and excusing the pumping of more money into the industry. It produces less radioactive waste and more power but it remains unproven on a commercial scale. ‘Even if thorium technology does progress to the point where it might be commercially viable, it will face the same problems as conventional nuclear: it is not renewable or sustainable and cannot effectively connect to smart grids. The technology is not tried and tested, and none of the main players is interested. Thorium reactors are no more than a distraction.

To listen to Dr. Caldicott’s earlier interviews with Dr. Makhijani, click HERE Best of 2008/2009: Dr. Arjun Makhijani on a clean-energy future without nuclear power, oil or coal http://tinyurl.com/z6b48l7

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HERE: Dr. Arjun Makhijani on the stunning potential for solar, wind and other green energy to replace fossil fuels and nuclear power right now http://tinyurl.com/j9s93mh

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and HERE. Why nuclear power is not the solution to global warming, and how renewables can power everythinghttp://tinyurl.com/hg72gf2

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Did you know every thorium reactor would require a reprocessing center? Also #Thorium Reactor would be enriching bomb grade material and present a bigger proliferation problem. Also problems getting heat sink from the intense heat that is generated and you have to worry about capturing all the deadly isotopes that are created. Have not worked out the kinks of sodium circuit boards frying.

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Without exception, [thorium reactors] have never been commercially viable, nor do any of the intended new designs even remotely seem to be viable. Like all nuclear power production they rely on extensive taxpayer subsidies; the only difference is that with thorium and other breeder reactors these are of an order of magnitude greater, which is why no government has ever continued their funding.’

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All other issues aside, thorium is still nuclear energy, say environmentalists, its reactors disgorging the same toxic byproducts and fissile waste with the same millennial half-lives. Oliver Tickell, author of Kyoto2, says the fission materials produced from thorium are of a different spectrum to those from uranium-235, but ‘include many dangerous-to-health alpha and beta emitters’.

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Tickell says thorium reactors would not reduce the volume of waste from uranium reactors. ‘It will create a whole new volume of radioactive waste from previously radio-inert thorium, on top of the waste from uranium reactors. Looked at in these terms, it’s a way of multiplying the volume of radioactive waste humanity can create several times over.’

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Thorium cannot in itself power a reactor; unlike natural uranium, it does not contain enough fissile material to initiate a nuclear chain reaction. As a result it must first be bombarded with neutrons to produce the highly radioactive isotope uranium-233 – ‘so these are really U-233 reactors,’ says Karamoskos.

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This isotope is more hazardous than the U-235 used in conventional reactors, he adds, because it produces U-232 as a side effect (half life: 160,000 years), on top of familiar fission by-products such as technetium-99 (half life: up to 300,000 years) and iodine-129 (half life: 15.7 million years).Add in actinides such as protactinium-231 (half life: 33,000 years) and it soon becomes apparent that thorium’s superficial cleanliness will still depend on digging some pretty deep holes to bury the highly radioactive waste. http://tinyurl.com/zk8jt3a

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Check out Helen Caldicott Playlist http://tinyurl.com/hgbxqv6 is an Australian physician, author, and anti-nuclear advocate who has founded several associations dedicated to opposing the use of nuclear power, depleted uranium munitions, nuclear weapons, nuclear weapons proliferation, war, and…